Do you not remember life before ICE and TSA or are you not old enough to legally rent a car?
There's maybe a few month period between the birth day cutoff and the founding of the DHS.
I'm well past the minimum age for renting a car, but I would not say that I remember airport security before the TSA - because I didn't experience it enough for it to have left any impression.
I do remember a much more recent trip to a foreign country, where on the return we were just walking through an airport hallway when I realized we had just gone through the security point. That is the way to do things.